1904.] PUBLIC DOCUMENT — No. 33. 113 



bone meal, South Carolina rock phosphate, i-aw bone meal, 

 phosplmtic slag, steamed bone meal, and dissolved bone- 

 blaok. Three phosphates gave results much inferior to any 

 of the others, viz., Tennessee phosphate, apatite, and Florida 

 soft phosphate. 



VI. — ^1. Soil test with corn. The crop of this 3^ ear was 

 very small on all plots, owing to the unfavorable season ; but 

 the potash increased the crop to a far greater extent than any 

 other plant-food element. B. Soil test with mixed gi-ass 

 and clover. The results demonstrate the close dependence 

 of the grass crop upon the supply of nitrate of soda. They 

 indicate also the increased tendency of continued use of 

 nitrate and muriate of potash to bring the soil into an acid 

 condition. Another marked result is the effect of an appli- 

 cation of lime in increasing the proportion of timothy in a 

 mowing sown to a mixture of timothy, red-top and clover. 



VII. — To determine the economical result of using in 

 rotation on grass lands : the first year, barn3'ard manure ; 

 the second year, wood ashes ; and the third year, ground 

 bone and muriate of potash. The average yield of hay, all 

 three systems of manuring being represented, is at the rate 

 of 8,104 pounds per acre in two crops. The average on 

 that portion of the field reseeded last summer is on one plot 

 at the rate of 8,546.5 pounds for the reseeded portion ; for 

 the portion not reseeded, 6,243 pounds. On another plot 

 the average yield on the reseeded portion is at the rate of 

 10,003 pounds, and on the portion not reseeded 5,642 

 pounds, per acre. 



VIII. — AVinter compared with spring application of ma- 

 nure. The field where this experiment is tried slopes mod- 

 erately lengthwise of the plots. The crop this year was soy 

 beans, and the crops under the two systems of application 

 Avere not far from equal, but with the advantage slightly in 

 favor of the winter over spring application. This result ap- 

 pears to have been due to the fact that the ground beneath 

 its covering of snow remained unfrozen throughout the win- 

 ter, and that there was practicall}^ no wash over the surface. 



IX. — To determine -the best nutritive ratio or the best 

 mixture of feeds for laying hens. The results of the year 



